Loose papers removed from the minute-books, with files of correspondence and papers of committees working on: (fols. 20-37) the standardisation of impact tests, 1916-20. (fols. 38-59) aeronautics, 1919-23. (fols. 60-71) gaseous explosions, 1919-23, 1933. (fols. 72-168) complex stress distributions in engineering materials, 1919-26. …